补充
http://www.nmedia.net/flashrd/
flashrd is an OpenBSD installer with an eye towards larger flash devices. The primary targets are USB key, Flash disk module, Compact Flash adapter, or hard disk.
做网关,我用过
http://m0n0.ch/wall/
还用过
http://www.pfsense.com/
最终用回OpenBSD 官方版自己配置,这样才可以学到东西。
如果不想花时间,pfsense确实方便